Originally Posted by mwood7800
Will this work on my r60, how does the tach work..
Honestly I'm not sure if it will work on the R60. The Harmonizer measures the difference in intake vacuum. Some early airheads didn't have vacuum nipples anywhere between the head and the throttle slide or butterfly. If the bike doesn't have vacuum nipples, it won't work without adding them.
The tach works by measuring the frequency of the vacuum pulses to calculate RPM.
Thanks for the inquiry!